EN
20
2 .7
Hydraulic connections
Components shall be chosen and installed by a skilled installer
who shall operate according to rules of good practice and the
laws in force. Before connecting the pipes, ensure they are free
from stones, grit, rust, debris or any foreign bodies which may
damage the system.
The connecting pipes must be supported, so that their weight
does not rest on the appliance.
The hydraulic connections should be completed by installing:
– air vents valves at the highest points of the pipes
– flexible elastic joints
– on/off valves.
The hydraulic connections are positioned on the top of the unit.
The hydraulic connections may be made towards the wall (con-
cealing them from sight) or upwards. Connect a drain pipe to
water safety valve so as to prevent that some water leakage can
get inside electrical parts.
Be careful not to invert delivery and return lines.
1.
Boiler delivery (1”)
2.
Boiler return (1”)
3.
Hot water (3/4”)
4.
Hot water feed (3/4”)
5.
Boiler delivery (3/4”)
6.
Boiler return (3/4”)
7.
Solar delivery (12 mm)
8.
Solar return (12 mm)
9.
Liquid line (3/8)
10.
Gas line (5/8)
11.
System return (1”)
12.
System delivery (1”)
13.
Boiler delivery/return alternative connections
1
2
3
9
10
13
4 5 6 7 8
11
12
The minimum nominal diameter of the connection pipes
must be 1”.
To allow the maintenance and repair operations it is indispen-
sable that each hydraulic connection is fitted with respective
manual closing valves.
The maximum pressure losses allowed are those defined in P2
secondary pump flow rate/head chart p<?>
Add an external pump should higher head be necessary due to
high pressure loss in the system.
The cooled water distribution pipes must be adequately insu-
lated with expanded polyethylene or similar material with a
thickness of at least 13 mm. The on-of valves, elbows and fittings
must also be adequately insulated.
To avoid pockets of air inside the circuit we strongly recommend
including automatic or manual venting devices in all points
(high pipes, siphons etc.) where air can accumulate
Installed a pressure reducer on the charge if the network pres-
sure is higher than 3 bar.
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